From: Randall Parker 

Gregg,

The reason I'm changing process priority is that the machine gets sluggish when I'm
using other processes. Sometimes changing the process priority helps. Sometimes it
doesn't. I am puzzled why it doesn't always help when shutting down FireFox
does help.

Gregg N wrote:

> Changing the priority of a process will not affect its CPU utilization
> unless something of higher priority requires the CPU. For example, right now
> the System Idle Process on my computer is using 99% CPU. The fact that it is
> the lowest priority thing on my system does not prevent it from using almost
> 100% CPU.
>
> Most user-driven applications are I/O bound, not CPU bound. A flash
> animation is likely CPU bound. Therefore, making the flash animation run at
> lower priority will not change its CPU utilization if the higher priority
> processes are all waiting for keyboard input.
>
> Gregg
>

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